Based on actuality of design and construction of our country, this paper describes the necessity of development on calculation system for catenary Project. Combining the technology of electrification catenary with computer, this paper introduces the principle and idea of design, general demand, design of module function, technical feature and realistic process of catenary project in detail. The exploration of system and successful apply not only has resolved the difficult technology problem in enterprise, but also has brought considerable benefit of economy and society for enterprise, and it has been a modern tool for enterprise. This paper as a summarize of author's exploration and development for many years, it can be for reference to the counterparts in future.